Method and apparatus for registration, communication and handover of Mobile Node

Abstract

The present invention relates to mobile communication technologies, and discloses a method and an apparatus for registration, communication, and handover of a Mobile Node (MN). The present invention is intended to overcome the bottlenecks of data traffic and processing capability in the home network in the prior art. A distributed mobility management system is provided herein. The system includes at least two Mobility Management Anchors (MMAs): any two MMAs are interconnected; at least one terminal exists in each MMA connection; each MMA stores a terminal binding relationship table; and the terminal binding relationship table records identifiers (IDs) and Internet Protocol (IP) addresses of terminals. The distributed mobility management system under the present invention can balance load, improve the data processing capability, simplify the signaling interaction in various procedures, and improve the system processing capability.

What is claimed is: 
     
       1. A Mobile Node (MN) communication method, comprising:
 receiving, by a first Mobility Management Anchor (MMA), a packet that carries an identifier (ID) of an MN from a Corresponding Node (CN); 
 querying a binding relationship of the MN according to the ID carried in the packet; and 
 sending data in the packet that carries the ID to the MN according to the binding relationship of the MN; 
 wherein the method further comprises: 
 receiving, by the first MMA, an Internet Protocol (IP) address obtaining request sent by the MN; 
 allocating an IP address to the MN and obtaining identifier information of the MN according to the IP address obtaining request sent by the MN; wherein the identifier information is a random number generated according to the IP address and the identifier information indicates the MN ID, and 
 binding the IP address of the MN to the identifier information according to the identifier information. 
 
     
     
       2. The MN communication method according to  claim 1 , wherein querying of the MN binding relationship according to the ID carried in the packet comprises:
 by a second MMA adjacent to the CN, according to the ID carried in the packet, querying a third MMA which stores the MN binding relationship; 
 sending the packet to a fourth MMA corresponding to the MN binding relationship; and 
 querying, by the fourth MMA corresponding to the MN binding relationship, the MN binding relationship according to the ID carried in the packet. 
 
     
     
       3. The MN communication method according to  claim 2 , wherein sending the data in the packet to the MN according to the MN binding relationship comprises:
 obtaining, by the second MMA adjacent to the CN, the fourth MMA corresponding to the MN binding relationship; and 
 sending, by the CN, the packet that carries the ID of the MN to the MN through the fourth MMA corresponding to the MN binding relationship. 
 
     
     
       4. The MN communication method according to  claim 3 , wherein sending the data in the packet that carries the ID to the MN according to the MN binding relationship comprises:
 replacing the ID in the packet with the Internet Protocol (IP) address of the MN and forwarding the packet to the MN; or adding the IP address of the MN into the packet that carries the ID and forwarding the packet to the MN directly. 
 
     
     
       5. The MN communication method according to  claim 1 , wherein binding the IP address of the MN to the identifier information according to the identifier information comprises:
 binding the identifier information to the IP address of the MN; 
 querying, by the first MMA, a binding relationship table according to the identifier information of the MN; 
 if the identifier information of the MN exists in the binding relationship table, refreshing the binding relationship table according to a binding relationship between the IP address and the identifier information of the MN; or 
 if the identifier information of the MN does not exist in the binding relationship table, inserting the binding relationship between the IP address and the identifier information of the MN into the binding relationship table. 
 
     
     
       6. A Mobile Node (MN) communication method, comprising:
 receiving, by a first Mobility Management Anchor (MMA) which is an adjacent node to a Corresponding Node (CN), a packet that carries an identifier (ID) of a Mobile Node (MN) from the CN, wherein identifier information is a random number generated according to an Internet Protocol (IP) address and the identifier information indicates the MN ID; 
 querying, by the first MMA adjacent to the CN, a second MMA according to the ID carried in the packet, wherein the second MMA stores an MN binding relationship; 
 sending, by the second MMA, the packet to the MN according to the MN binding relationship after receiving the packet; 
 wherein sending, by the second MMA, the packet to the MN according to the MN binding relationship after receiving the packet further comprises: 
 replacing the ID of the MN in the packet with the IP address of the MN, then sending the packet to the MN; or 
 sending the packet to the MN by adding the IP address of the MN into the packet that carries the ID. 
 
     
     
       7. The MN communication method according to  claim 6 , wherein sending, by the second MMA, the packet to the MN according to the MN binding relationship after receiving the packet further comprises: sending, by the CN, the packet that carries the ID of the MN to the MN through the second MMA. 
     
     
       8. A Mobile Node (MN) communication method, comprising:
 receiving, by a first Mobility Management Anchor (MMA), a packet that carries an identifier (ID) of an MN from a Corresponding Node (CN); 
 querying a binding relationship of the MN according to the ID carried in the packet; and 
 sending data in the packet that carries the ID to the MN according to the binding relationship of the MN; 
 wherein querying the binding relationship of the MN according to the ID carried in the packet comprises:
 by a second MMA adjacent to the CN, according to the ID carried in the packet, querying a third MMA which stores the MN binding relationship; 
 sending the packet to a fourth MMA corresponding to the MN binding relationship; and 
 querying, by the fourth MMA corresponding to the MN binding relationship, the MN binding relationship according to the ID carried in the packet; 
 
 wherein sending data in the packet that carries the ID to the MN according to the binding relationship comprises:
 obtaining, by the second MMA adjacent to the CN, the fourth MMA corresponding to the MN binding relationship; and 
 sending, by the CN, the packet that carries the ID of the MN to the MN through the fourth MMA corresponding to the MN binding relationship. 
 
 
     
     
       9. The MN communication method according to  claim 8 , wherein sending the data in the packet that carries the ID to the MN according to the MN binding relationship comprises:
 replacing the ID in the packet with an Internet Protocol (IP) address of the MN and forwarding the packet to the MN; or adding the IP address of the MN into the packet that carries the ID and forwarding the packet to the MN directly.